{
  "manageEntity": {
    "action": "Save",
    "entityId": "396955118",
    "entityType": "Track",
    "nonce": "0xecaa3eb805a28f6704976eb8eef9ccb9cf55fd50283af716616a50f42103fcba",
    "signature": "0x0a07d75192f37cb986093ce4af01b3d8681d1bab5d2ce245347f73800f1d46e136e6d4c36ec00dabf0d1d7aa0add9018f221c07d424c3a8ea0bbb72e5965e9251b",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}